Information of great value for seismic processing and interpretation can be gleaned from synthetic seismogram ties and their associated well-based wavelet extractions, but only if the well data are excellent. If the well data are not very closely and correctly edited, wrong conclusions are likely.

Synthetic seismograms often fail to tie with surface seismic data because they are made from well logs distorted by borehole washouts, formation damage, tool miscalibrations, digitizing or database errors, and many other difficulties. These difficulties may be overcome by editing the logs, especially if the editing method is multizone and multiwell, and uses regression rather...